But it was a critical part of the power supply system.

但是，电力基础设施却是供电系统中至关重要的一环。

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The power supply system adopted the direct replacement method.

供电电源系统采用直接替代的方法。

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So, the power supply system has reduced weight and volume with increased efficiency and decreased noise.

这样，大大地减小了变换装置的体积和重量，提高了效率，减小了听觉噪声。

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The internal design architecture of the new PS3 system, from the main semiconductors and power supply unit to the cooling mechanism, has been completely redesigned, achieving a much slimmer and lighter body.

ENGADGET: Sony unveils slimmer PS3: $300, lands in September (updated!)

The cool-running, lower-power Barracuda Green hard drive delivers whisper-quiet acoustics and helps reduce system costs associated with the fans and power supply devices often required for power-hungry systems.

ENGADGET: Seagate ships 3.5-inch Barracuda Green internal hard drive, leaves and all

Many in the utility industry worry that the most vulnerable part of the power system is its work force, as a wave of retirements is depleting the supply of linemen and other craftsmen who keep the lights on.

NPR: Young Workers Find Opportunity In Power Industry